Lamis M. FahmyDalia MohamedMarianne NebsenAhmed H. Nadim2024-11-172024-11-172024-11-01Fahmy, L. M., Mohamed, D., Nebsen, M., & Nadim, A. H. (2024). Eco-friendly tea waste magnetite nanoparticles for enhanced adsorptive removal of norfloxacin and paroxetine from water. Microchemical Journal, 111619. https://doi.org/10.1016/j.microc.2024.111619https://doi.org/10.1016/j.microc.2024.111619https://repository.msa.edu.eg/handle/123456789/6240Traces of pharmaceuticals have been detected in water cycle raising concerns regarding the potential risks to human health and aquatic environment. Accordingly, removal of such compounds from water samples is a major concern. Herein, a facile and green NaOH modified tea waste magnetite nanoparticles have been fabricated for the adsorptive removal of a commonly used antibiotic (norfloxacin) and antidepressant (paroxetine) from water samples. The synthesized nanoparticles were characterized using TEM, FT-IR, DLS and VSM. Factors affecting the adsorption efficiency have been investigated with respect to pH (5, 7 and 9), adsorbent amount (0.125, 0.25 and 0.5 g), initial drug concentration (25, 50 and 100 µg/mL) and contact time (0.5, 1 and 2 h). The adsorption isotherms have been calculated. A percentage removal of 98 % and 99 % were obtained for simultaneous removal of 50 µg/mL norfloxacin and paroxetine, respectively in 2 h. Monitoring norfloxacin and paroxetine concentrations was performed through a validated HPLC-DAD method. The reusability of the nanoparticles has been studied for 3 adsorption–desorption cycles. No significant loss in adsorption efficiency was observed offering a sustainable water treatment. This study would offer a facile, green and economic protocol for the removal of complex organic compounds from water resources.en-USGreen adsorbentMagnetite nanoparticlesNorfloxacinParoxetineTea wasteArticlehttps://doi.org/10.1016/j.microc.2024.111619